I've since added some indicators to the enemy mechs and also turned down their aggression. I realize as the programmer I'm too familiar with how they behave, so I know what to anticipate for their attack patterns but to normal players it's almost relentlessly hard. I agree that the radar could be more accurate with the distance, and I'll also try adding some arrow indicators around the player to point out enemies coming from behind the camera position/mouse.
Thank you greatly for playing and the feedback, will use this information to refine it!